Mobile communication method and mobile station

Abstract

A radio base station PhNB managing a phantom cell is enabled to uniquely identify a mobile station UE in communication in the phantom cell. A mobile communication method according to the present invention includes starting, by the radio base station PhNB# 10 , a “Non-contention based RA procedure” or a “Contention based RA procedure” with a mobile station UE# 1 in communication in a cell # 10 under control of the radio base station PhNB# 10 ; and notifying, by the mobile station UE# 1 , the radio base station PhNB# 10 of a C-RNTI macro which is allocated in a cell # 1 other than the cell # 10.

The invention claimed is: 
     
       1. A mobile communication method, comprising:
 starting, by a radio base station, a random access procedure with a mobile station being in communication in a cell formed by linking several small cells under control of the radio base station; and 
 notifying, by the mobile station, in the random access procedure, the radio base station of a cell radio network temporary identifier (C-RNTI) which is allocated in a macro cell other than the cell, 
 wherein a coverage area of the cell partially overlaps a coverage area of the macro cell. 
 
     
     
       2. A mobile communication method, comprising:
 starting, by a radio base station, a random access procedure with a mobile station being in communication in a cell formed by linking several small cells under control of the radio base station; and 
 notifying, by the mobile station, in the random access procedure, the radio base station of a cell radio network temporary identifier (C-RNTI) which is allocated in a macro cell designated by the radio base station other than the cell, 
 wherein a coverage area of the cell partially overlaps a coverage area of the macro cell. 
 
     
     
       3. A mobile station, comprising:
 a processor and memory; and 
 a transmitter that notifies a radio base station of a cell radio network temporary identifier (C-RNTI) stored in the memory in a random access procedure if the random access procedure is started with the radio base station during communication in a cell formed by linking several small cells under control of the radio base station, the C-RNTI being an identifier allocated in a macro cell other than the cell, 
 wherein a coverage area of the cell partially overlaps a coverage area of the macro cell. 
 
     
     
       4. A mobile station, comprising:
 a processor and memory; and 
 a transmitter that notifies a radio base station of a cell radio network temporary identifier (C-RNTI) stored in the memory in a random access procedure if the random access procedure is started with the radio base station during communication in a cell formed by linking several small cells under control of the radio base station, the C-RNTI being an identifier allocated in a macro cell designated by the radio base station other than the cell, 
 wherein a coverage area of the cell partially overlaps a coverage area of the macro cell.